A scavenging centrifugal baffle pump includes a main pump including a pump housing, a gear external to the pump housing coupled to the main pump, a baffle connected to the main pump housing defining an interior volume, the gear at least partially located in the interior volume, a reservoir defined in the interior volume of the baffle, an inlet defined in the baffle adjacent to the reservoir, an opening defined in the baffle, wherein the opening exposes a portion of the gear, and an elongate passage defined by the baffle including an outlet, wherein the elongate passage connects the interior volume of the baffle with the outlet.

Disclosed are a bailer-type long-shaft pump and a pump station constructed using the long-shaft pump. The long-shaft pump comprises a bailer vehicle (110), a long shaft (120), a bearing (130), a transmission device (140) and an electric motor (150). The transmission device comprises a planetary gearbox (141), an orthogonal shaft gearbox (142) and a frequency converter (143); one end of the long shaft (120) successively passes through the bearing (130), the planetary gearbox (141), the orthogonal shaft gearbox (142) and the frequency converter (143), so as to be in transmission connection with a drive shaft of the electric motor (150); and the bailer vehicle (110) comprises a cylindrical base (112) and at least three blades (111) distributed on the surface of the cylindrical base (112) in an annular array radially extending from the center of the long shaft. Two adjacent blades and the surface of the cylindrical base forms a bailer capable of bailing water from a lower water side of a channel to a higher water side of the channel. The pump station (200) comprises a pump station foundation (210), several equipment rooms (231) transversely distributed at intervals and constructed on the pump station foundation (210), and two ends of the long shaft (120) of the bailer-type long-shaft pump (100) are supported on side walls of two adjacent equipment rooms. The bailer-type long-shaft pump achieve large water flow and low lift, the pump station is space-saving, has shorter construction cycle, and reduces investment and operation costs.

A liquid ring pump includes an external housing enclosing a volume including a lower fluid reservoir. A rotatable inner housing is within the volume of the external housing, the inner housing enclosing an inner fluid chamber. A pitot tube provides fluid communication between the lower fluid reservoir and the inner fluid chamber. The housings and pitot tube are adapted so that when the inner housing rotates, fluid flows from the lower fluid reservoir through the pitot tube into the inner fluid chamber to develop a liquid ring within the inner fluid chamber such that an inner radial wall of the liquid ring is just radially outward from a point where the pitot tube enters the inner fluid chamber.

A liquid ring pump includes an external housing enclosing a volume including a lower fluid reservoir. A rotatable inner housing is within the volume of the external housing, the inner housing enclosing an inner fluid chamber. A pitot tube provides fluid communication between the lower fluid reservoir and the inner fluid chamber. The housings and pitot tube are adapted so that when the inner housing rotates, fluid flows from the lower fluid reservoir through the pitot tube into the inner fluid chamber to develop a liquid ring within the inner fluid chamber such that an inner radial wall of the liquid ring is just radially outward from a point where the pitot tube enters the inner fluid chamber.

A method for designing a centrifugal pump and a mixed flow pump having a specific speed of 150-1200 comprises a design specification determination step for a turbo pump including an impeller, a specific speed determination step for the impeller, a design variable determination step for the impeller, and a three dimensional shape deriving step for the impeller. According to the present invention, the three dimensional shape of the impeller can be simply designed by converting the design variables related to the specific speed into a function and by putting optimized design variables into a database.

A water delivery system (18) for delivering water for injection into gas turbine engine combustor (4) includes a centrifugal pump (19) and a metering valve (23). The centrifugal pump (19) has an inlet (20) connected to a water source and a discharge (21) connected to a water supply line (22). The metering valve (23) is connected to the water supply line (22) downstream of the discharge (21) of the centrifugal pump (19). The water supply line (22) is connected to an injector nozzle (14) downstream of the metering valve (23). The metering valve (23) is operable to regulate a flow rate of water in the water supply line (22), to thereby meter an amount of water supplied to the injector nozzle (14).

A planetary gearbox device, a gas turbine engine with a planetary gearbox device, and a method for producing a scoop pump. The planetary gearbox device includes an oil supply appliance, wherein the oil supply appliance has a ring-shaped scoop pump that is connected to the rotatable shaft of the planetary gearbox device and an oil supply fixedly arranged at the housing and by which oil is supplied to the scoop pump. The scoop pump has multiple blades that extend in a circumferentially arranged manner and extend from a radially outer area in the direction of a radially inner area. The blades delimit grooves extending in the circumferential direction in the radial direction and respectively form a groove base of the grooves. The oil is conducted from the oil supply to outlets via which oil is conducted out of the scoop pump in the radial direction outwards.

A planetary gearbox device, a gas turbine engine with a planetary gearbox device, and a method for producing a scoop pump. The planetary gearbox device includes an oil supply appliance, wherein the oil supply appliance has a ring-shaped scoop pump that is connected to the rotatable shaft of the planetary gearbox device and an oil supply fixedly arranged at the housing and by which oil is supplied to the scoop pump. The scoop pump has multiple blades that extend in a circumferentially arranged manner and extend from a radially outer area in the direction of a radially inner area. The blades delimit grooves extending in the circumferential direction in the radial direction and respectively form a groove base of the grooves. The oil is conducted from the oil supply to outlets via which oil is conducted out of the scoop pump in the radial direction outwards.

A turbomachine having a rotor that extends along a rotational axis and a radial bearing in which the rotor is radially mounted on a radial bearing point. In the axial region of the radial bearing point, the rotor has a hollow chamber annularly located in the circumferential direction in the region of the outer 20% of the diameter of the radial bearing point and which is thermally insulating between a radially inner core region of the rotor in the region of the radial bearing point and the radial outer region of the rotor in the region of the radial bearing point. A first shaft end of the rotor protrudes from the axial center of the radial bearing point by a projection over the radial bearing point, wherein a first quotient QLO of the projection OVH divided by the total length TLE of the rotor QLO=OVH/TLE>0.15.

A turbomachine having a rotor that extends along a rotational axis and a radial bearing in which the rotor is radially mounted on a radial bearing point. In the axial region of the radial bearing point, the rotor has a hollow chamber annularly located in the circumferential direction in the region of the outer 20% of the diameter of the radial bearing point and which is thermally insulating between a radially inner core region of the rotor in the region of the radial bearing point and the radial outer region of the rotor in the region of the radial bearing point. A first shaft end of the rotor protrudes from the axial center of the radial bearing point by a projection over the radial bearing point, wherein a first quotient QLO of the projection OVH divided by the total length TLE of the rotor QLO=OVH/TLE>0.15.